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Cleaner than the Chinese, but still pretty dirty. That 90 acre pit made to contain the "sludge of unwanted residue" will be a landmark for centuries to come. I didn't really know that the U.S. had such a wealth of rare earth. I only thought it was produced in China because it is rare. Frankly, I'm happy to see a mine in California renovated and reopened.
Yeah, it's funny how common rare earth minerals are. I imagine the term rare is used to reflect the amount of processing it takes to get them. I believe they are abundant in many many places, just in low quantities that require a lot of work to extract them.